Synergistic effects of sulfation and co-doping on the visible light photocatalysis of TiO2

Srinivasan, Sesha S.; Wade, Jeremy; Stefanakos, Elias K.; Goswami, Yogi

doi:10.1016/j.jallcom.2005.12.064

Cited by 87 publications

(36 citation statements)

References 16 publications

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“…The location of metal codopants is an important factor affecting the photocatalytic activity of photocatalysts, whether metal species are substituted in place of Ti 4? in the TiO 2 lattice or dispersed on its surface [16]. The atomic radii of the metals are in the order: Fe \ Ti \ Nb.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Estrellan

Salim

Hinode

2009

React Kinet Catal Lett

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Titanium dioxide (TiO 2 ) photocatalysts co-doped with iron (Fe) and niobium (Nb) were synthesized using a temperature-controlled sol-gel method. The photocatalysis products were characterized and the photocatalytic activities were evaluated by the degradation of aqueous methyl orange solution. Enhanced photocatalytic activity compared to undoped TiO 2 was attributed to the cooperative effects of metal dopants, Fe and Nb.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Estrellan

Salim

Hinode

2009

React Kinet Catal Lett

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“…The limited applications to the breakdown of organic matter (but not inorganic matter) make this kind of coating rather unsuitable for coastal areas where salt from sea mist can be deposited in the windows. As such additional cleaning would be necessary for good maintenance of the glazing [8,21]. Glazing for these types of areas also pose a challenge in terms of mechanical strength, as the impact of sand and other inorganic particles on the window surface can deteriorate the glazing much quicker.…”

Section: Conclusion and Outlook For Self-cleaning Glazingmentioning

confidence: 99%

Thin Films for Advanced Glazing Applications

et al. 2016

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Functional thin films provide many opportunities for advanced glazing systems. This can be achieved by adding additional functionalities such as self-cleaning or power generation, or alternately by providing energy demand reduction through the management or modulation of solar heat gain or blackbody radiation using spectrally selective films or chromogenic materials. Self-cleaning materials have been generating increasing interest for the past two decades. They may be based on hydrophobic or hydrophilic systems and are often inspired by nature, for example hydrophobic systems based on mimicking the lotus leaf. These materials help to maintain the aesthetic properties of the building, help to maintain a comfortable working environment and in the case of photocatalytic materials, may provide external pollutant remediation. Power generation through window coatings is a relatively new idea and is based around the use of semi-transparent solar cells as windows. In this fashion, energy can be generated whilst also absorbing some solar heat. There is also the possibility, in the case of dye sensitized solar cells, to tune the coloration of the window that provides unheralded external aesthetic possibilities. Materials and coatings for energy demand reduction is highly desirable in an increasingly energy intensive world. We discuss new developments with low emissivity coatings as the need to replace scarce indium becomes more apparent. We go on to discuss thermochromic systems based on vanadium dioxide films. Such systems are dynamic in nature and present a more sophisticated and potentially more beneficial approach to reducing energy demand than static systems such as low emissivity and solar control coatings. The ability to be able to tune some of the material parameters in order to optimize the film performance for a given climate provides exciting opportunities for future technologies. In this article, we review recent progress and challenges in these areas and provide a perspective for future trends and developments.

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“…It can be explained that non-metal doping improve visible light absorption, while the precious metal deposited on the surface is conducive to the transfer of photogenerated carriers [61]. Sulfated and metal doping also have synergistic effects, which can improve the visible light photocatalytic activity [62].…”

Section: Synergistic Effects Of Metal and Nonmetal Codopingmentioning

confidence: 99%

Photocatalytic mechanisms of modified titania under visible light

2010

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Heterogeneous photocatalysis with titania under visible light has increasingly been a focus for research. Metal or non-metal doping, surface sensitization, semiconductor coupling, precious metal deposition and increasing crystal defects have been used to enhance the photocatalytic activity of titania under visible light. Based on the research results of different modification methods in recent years, some mechanisms from the excitation, bulk diffusion and surface transfer of photoinduced charge carriers, such as band gap modification, changing the excitation path, promoting the separation of photogenerated charge carrier, improving the surface adsorption and reaction, and synergistic effects, for photocatalysis under visible light are discussed and the development trend in this field is predicted.

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Synergistic effects of sulfation and co-doping on the visible light photocatalysis of TiO2

Cited by 87 publications

References 16 publications

Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Thin Films for Advanced Glazing Applications

Photocatalytic mechanisms of modified titania under visible light

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